Vane geometry for measurement of influent rheological behaviour in dry anaerobic digestion

Etienne Yves-Martial Beugre and Théophile Gnagne

Renewable and Sustainable Energy Reviews, 2022, vol. 155, issue C

Abstract: The knowledge of the rheology of influents involved in dry anaerobic digestion is an essential factor for process optimization. Despite this fact, it is difficult to characterize the rheological behaviour of these influents with high total solid (TS) content. Indeed, standard methods of rheological measurements are poorly adapted to these influents because of the sliding effects observed during the measurements. In this study, we used a non-standard method, the Vane geometry, for its particularity to limit the sliding effects. Two types of measurements were carried out on potato influents of 18–35% TS, extracted from the digesters. The first measurement was to submit to the sample a rising shear velocity ramp from 0 to 200 s−1 at 37 °C and 55 °C. The results of these measurements show a good correlation between the rheograms and Herschel-Bulkley model and we deduced a pseudoplastic threshold behaviour. The second measurement was performed in oscillations at 10 Hz at 25 °C, 37 °C and 55 °C. The results show different evolutions of the elastic G′ and viscous G″ modulus as a function of temperature. There is a crossing of G′ and G″ at 25 °C, G′ greater than G″ at 37 °C, and finally G′ and G″ forming a plateau at 55 °C, characteristic of a gel. The knowledge of these rheological behaviour is crucial for the design and operating instructions of anaerobic digestion reactors for influents with high TS content. The Vane geometry would, therefore, be an effective tool for characterizing the rheological behaviour of influents in dry anaerobic digestion.

Keywords: Dry anaerobic digestion; Rheology; Vane geometry; Threshold fluid; Pseudoplastic (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S136403212101193X
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:rensus:v:155:y:2022:i:c:s136403212101193x

Ordering information: This journal article can be ordered from
http://www.elsevier.com/wps/find/journaldescription.cws_home/600126/bibliographic
http://www.elsevier. ... 600126/bibliographic

DOI: 10.1016/j.rser.2021.111928

Access Statistics for this article

Renewable and Sustainable Energy Reviews is currently edited by L. Kazmerski

More articles in Renewable and Sustainable Energy Reviews from Elsevier
Bibliographic data for series maintained by Catherine Liu ().